[MPlayer-dev-eng] BUG? swscaler vs 422planar

Arpi arpi at thot.banki.hu
Tue Sep 10 01:51:26 CEST 2002


Hi,

> >
> > try with any divx/mpeg file (native yv12 codecs):
> > mplayer file.avi -vop yuy2,format=422p,scale
> >
> > (it forces codec->yv12-(swscaler)->422p-(yuy2)->yuy2->vo path)
> >
> > the result is interesting - every second chroma line is blank,
> > so you get interlaced-feeling image.
> > i hoped that swscaler will upsample (interpolate) chroma (but at least
> > duplicate chroma lines) when doing yv12->422p conversion.
> fixed, the problem was that the code expected yv12 so it skiped every 2nd 
> chroma line ...

thank you, it's working fine now!
btw it improves image quality a lot of low-res movies with mga_vid, as
matrox doesn't interpolate chroma verticaly for planar yuv.


A'rpi / Astral & ESP-team

--
Developer of MPlayer, the Movie Player for Linux - http://www.MPlayerHQ.hu



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